121340344273 has 2 divisors, whose sum is σ = 121340344274. Its totient is φ = 121340344272.

The previous prime is 121340344261. The next prime is 121340344303. The reversal of 121340344273 is 372443043121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110946949569 + 10393394704 = 333087^2 + 101948^2 .

It is a cyclic number.

It is not a de Polignac number, because 121340344273 - 2⁵ = 121340344241 is a prime.

It is not a weakly prime, because it can be changed into another prime (121340344973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670172136 + 60670172137.

It is an arithmetic number, because the mean of its divisors is an integer number (60670172137).

Almost surely, 2^121340344273 is an apocalyptic number.

It is an amenable number.

121340344273 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340344273 is an equidigital number, since it uses as much as digits as its factorization.

121340344273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 34.

Adding to 121340344273 its reverse (372443043121), we get a palindrome (493783387394).

The spelling of 121340344273 in words is "one hundred twenty-one billion, three hundred forty million, three hundred forty-four thousand, two hundred seventy-three".